/**
 *    Copyright ${license.git.copyrightYears} the original author or authors.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package org.mybatis.generator.codegen.mybatis3.xmlmapper.elements;

import org.mybatis.generator.api.IntrospectedColumn;
import org.mybatis.generator.api.dom.xml.Attribute;
import org.mybatis.generator.api.dom.xml.TextElement;
import org.mybatis.generator.api.dom.xml.XmlElement;
import org.mybatis.generator.codegen.mybatis3.MyBatis3FormattingUtilities;

/**
 * 
 * @author Jeff Butler
 * 
 */
public class DeleteByPrimaryKeyElementGenerator extends AbstractXmlElementGenerator {

  private boolean isSimple;

  public DeleteByPrimaryKeyElementGenerator(boolean isSimple) {
    super();
    this.isSimple = isSimple;
  }

  @Override
  public void addElements(XmlElement parentElement) {
    XmlElement answer = new XmlElement("delete"); //$NON-NLS-1$

    answer.addAttribute(new Attribute("id", introspectedTable.getDeleteByPrimaryKeyStatementId())); //$NON-NLS-1$
    String parameterClass;
    if (!isSimple && introspectedTable.getRules().generatePrimaryKeyClass()) {
      parameterClass = introspectedTable.getPrimaryKeyType();
    } else {
      // PK fields are in the base class. If more than on PK
      // field, then they are coming in a map.
      if (introspectedTable.getPrimaryKeyColumns().size() > 1) {
        parameterClass = "map"; //$NON-NLS-1$
      } else {
        parameterClass = introspectedTable.getPrimaryKeyColumns().get(0).getFullyQualifiedJavaType().toString();
      }
    }
    answer.addAttribute(new Attribute("parameterType", //$NON-NLS-1$
        parameterClass));

    context.getCommentGenerator().addComment(answer);

    StringBuilder sb = new StringBuilder();
    sb.append("delete from "); //$NON-NLS-1$
    sb.append(introspectedTable.getFullyQualifiedTableNameAtRuntime());
    answer.addElement(new TextElement(sb.toString()));

    boolean and = false;
    for (IntrospectedColumn introspectedColumn : introspectedTable.getPrimaryKeyColumns()) {
      sb.setLength(0);
      if (and) {
        sb.append("  and "); //$NON-NLS-1$
      } else {
        sb.append("where "); //$NON-NLS-1$
        and = true;
      }

      sb.append(MyBatis3FormattingUtilities.getEscapedColumnName(introspectedColumn));
      sb.append(" = "); //$NON-NLS-1$
      sb.append(MyBatis3FormattingUtilities.getParameterClause(introspectedColumn));
      answer.addElement(new TextElement(sb.toString()));
    }

    if (context.getPlugins().sqlMapDeleteByPrimaryKeyElementGenerated(answer, introspectedTable)) {
      parentElement.addElement(answer);
    }
  }
}
